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import {
BufferGeometry,
Float32BufferAttribute
} from 'three';
import { ConvexHull } from '../math/ConvexHull.js';
class ConvexGeometry extends BufferGeometry {
constructor( points = [] ) {
super();
// buffers
const vertices = [];
const normals = [];
if ( ConvexHull === undefined ) {
console.error( 'THREE.ConvexGeometry: ConvexGeometry relies on ConvexHull' );
}
const convexHull = new ConvexHull().setFromPoints( points );
// generate vertices and normals
const faces = convexHull.faces;
for ( let i = 0; i < faces.length; i ++ ) {
const face = faces[ i ];
let edge = face.edge;
// we move along a doubly-connected edge list to access all face points (see HalfEdge docs)
do {
const point = edge.head().point;
vertices.push( point.x, point.y, point.z );
normals.push( face.normal.x, face.normal.y, face.normal.z );
edge = edge.next;
} while ( edge !== face.edge );
}
// build geometry
this.setAttribute( 'position', new Float32BufferAttribute( vertices, 3 ) );
this.setAttribute( 'normal', new Float32BufferAttribute( normals, 3 ) );
}
}
export { ConvexGeometry };